CLICK FOR PHOTO GALLERY: Johnny Cash's family and friends and country stars gathered on stage to salute the 'Man in Black' at the Ryman Auditorium on June 5, as the U.S. Postal Service unveiled a new 'Forever Stamp' featuring the country legend (photo: Samuel M. Simpkins/The Tennessean)

"I've been everywhere, man," Johnny Cash once sang. Now, an iconic image of the Man In Black will continue to travel the globe through a new limited-edition "Forever Stamp" issued by the U.S. Postal Service. As the stamp went on sale Wednesday morning, family, fans and friends of the late country legend gathered at the Ryman Auditorium to celebrate and pay musical tribute.

It was an emotional morning for Cash's children in attendance, and as they spoke to the audience, John Carter Cash and Kathy Cash believed it would have been a moving moment for their father, too.